This message was posted on behalf of Intel Corporation
Yes, it seems USB 3.0 drivers are not part of the Windows® 7 installation disk.
You will need to slipstream the drivers onto Windows® 7 setup.
Please try steps available for Intel® NUC:
USB 3.0 drivers for Windows® 7: https://downloadcenter.intel.com/download/21129/USB-3-0-Driver-Intel-USB-3-0-eXtensible-Host-Controller-Driver-for-Intel-7-Series-C216-Chipset-Family